Launchbury suffered two knocks to the head in the Premiership triumph at the Ricoh Arena and will give England coach Eddie Jones some cause for concern ahead of his forthcoming squad announcement.

Young said: “He’s taken a nasty head knock but he’s up and about. He’s talking and appears to be fine but we will have to go through the relevant protocols.

“It could take one or six weeks, it’s impossible to tell at this stage.”

The afternoon could have been a whole lot worse for the home side as faultless kicking from Andy Symonds had threatened to earn Warriors a shock win. He kicked five penalties and converted an interception try from Cooper Vuna. Lethargic Wasps trailed 22-13 with 12 minutes to go but tries from replacement Guy Thompson, and Frank Halai and Saliosi Tagicakibau, broke Worcester’s hearts and sent them back to Sixways without even a bonus point.

Kearnan Myall had scored Wasps’ first try with Jimmy Gopperth converting three of the tries and adding two penalties.

Young said: “We got out of jail as, with eight minutes to go, a betting man would have clearly put money on them.

“I’m frustrated with our lack of accuracy as we had lots of possession but we didn’t create enough and I’m pleased we didn’t give up.

“I still expect to see Launchbury, Elliot Daly, Joe Simpson, Matt Mullan and James Haskell selected in the England squad.”

Warriors boss Dean Ryan was again frustrated by his side’s failure to close out the game.

He said: “We still haven’t got the experience to get us over the line. At the end our kicking game wasn’t accurate enough.

“They got more and more frustrated as we had a limited game-plan and we came very close. We were stripped of a number of players and had to play a third-choice fly-half so we kept it simple but it was another opportunity missed.”